In his message, the Cash Money Records superstar discussed the weapons charges that landed him in Rikers Island (he's learned his lesson), his recreational activities (he's an Uno champ!) and his workout regime (he's buff, sort of).

"Well ain't nothing going on in here but the time, which seems like it's taking forever," the rapper wrote in his letter, the fifth he's posted so far. "I'm trying to make the most out of every second tho, mentally. There's some pretty cool people in here. Even though this isn't a cool place to be. I've learned plenty already and the best lesson is to not come back. Last night, I kicked ass in UNO! Anyway, that's neither here nor there. Just thought I'd let y'all know. Gotta stay hydrated. Though it's hot, I still work out. Now don't be expecting me to look like Hercules when I get out, but I should be a little bulky."

Weezy signed off by thanking many of his fans individually and personally; he often responds to letters fans have written him with a nod to the subject.

"Stay focused. Cool rap name!" he wrote to Dominick Johnson.

"I thank you for being such a longtime fan. And yes, you brought a smile to my face. So it was well worth it," he wrote to Violet Grann.

The letter might be a bit dated, as there's a message from Wayne to Chris Bosh telling the newly signed Miami Heat star he should team up with Kobe Bryant in Los Angeles. Wayne also promotes two projects of his in the letter: his EP I'm Not a Human Being and the DJ Scoob Doo-directed "Nino Brown Story 3," both slated for upcoming releases.

What do you think about Lil Wayne's recent letter? Let us know in the comments!